Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages
Dinoflagellate cyst (dinocyst) records from the southern Nordic Seas were compiled in order to evaluate the evolution of upper ocean conditions, on a millennial timescale and supported by a highly resolved record from the Vøring Plateau. After the transitional phase from the last deglaciation, three...
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ftuniaarhuspubl:oai:pure.atira.dk:publications/dd908908-4579-4965-90dd-b73a229d382a 2024-05-12T08:05:57+00:00 Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages Van Nieuwenhove, Nicolas Baumann, Astrid Matthiessen, Jens Bonnet, Sophie de Vernal, Anne 2016-05 https://pure.au.dk/portal/en/publications/dd908908-4579-4965-90dd-b73a229d382a https://doi.org/10.1177/0959683615618258 eng eng https://pure.au.dk/portal/en/publications/dd908908-4579-4965-90dd-b73a229d382a info:eu-repo/semantics/closedAccess Van Nieuwenhove , N , Baumann , A , Matthiessen , J , Bonnet , S & de Vernal , A 2016 , ' Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages ' , The Holocene , vol. 26 , no. 5 , pp. 722-735 . https://doi.org/10.1177/0959683615618258 Holocene PHYTOPLANKTON dinocysts oceanography sea surface seasonality article 2016 ftuniaarhuspubl https://doi.org/10.1177/0959683615618258 2024-04-17T23:42:41Z Dinoflagellate cyst (dinocyst) records from the southern Nordic Seas were compiled in order to evaluate the evolution of upper ocean conditions, on a millennial timescale and supported by a highly resolved record from the Vøring Plateau. After the transitional phase from the last deglaciation, three main phases define the Holocene. The early Holocene (>7.5 ka BP) features important numbers of cool-temperate species dominated by Nematosphaeropsis labyrinthus and Impagidinium pallidum in the west. The assemblage composition changes drastically at the transition from the early to the mid-Holocene, from when on Operculodinium centrocarpum dominates. The changeover is dated between ~6.1 and 7.5 ka BP, perhaps earlier closer to the Iceland– Scotland Ridge, and appears to be linked to the onset of a modern type of surface circulation. ‘Warmest’ assemblages occur at the Vøring Plateau shortly after the transition, when Atlantic waters also appear to have spread farthest westward. The recurrence of colder elements can be linked to cooling from ~2.4 ka BP at the Vøring Plateau and presumably earlier in the west but is difficult to date there because of the low sedimentation rates. This is a general issue in many areas of the Nordic Seas and appears to have an important effect on cyst concentrations and assemblage composition, with the possible loss of oxygenation-sensitive cysts in the older parts of the cores. Comparing dinocyst-based quantitative reconstructions with those retrieved from other plankton reveals a significantly different trend between proxies, linked to a differing autecological response to seasonal changes at their respective depth habitats. Article in Journal/Newspaper Iceland Nordic Seas Aarhus University: Research Vøring Plateau ENVELOPE(4.000,4.000,67.000,67.000) The Holocene 26 5 722 735 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Holocene PHYTOPLANKTON dinocysts oceanography sea surface seasonality |
spellingShingle |
Holocene PHYTOPLANKTON dinocysts oceanography sea surface seasonality Van Nieuwenhove, Nicolas Baumann, Astrid Matthiessen, Jens Bonnet, Sophie de Vernal, Anne Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages |
topic_facet |
Holocene PHYTOPLANKTON dinocysts oceanography sea surface seasonality |
description |
Dinoflagellate cyst (dinocyst) records from the southern Nordic Seas were compiled in order to evaluate the evolution of upper ocean conditions, on a millennial timescale and supported by a highly resolved record from the Vøring Plateau. After the transitional phase from the last deglaciation, three main phases define the Holocene. The early Holocene (>7.5 ka BP) features important numbers of cool-temperate species dominated by Nematosphaeropsis labyrinthus and Impagidinium pallidum in the west. The assemblage composition changes drastically at the transition from the early to the mid-Holocene, from when on Operculodinium centrocarpum dominates. The changeover is dated between ~6.1 and 7.5 ka BP, perhaps earlier closer to the Iceland– Scotland Ridge, and appears to be linked to the onset of a modern type of surface circulation. ‘Warmest’ assemblages occur at the Vøring Plateau shortly after the transition, when Atlantic waters also appear to have spread farthest westward. The recurrence of colder elements can be linked to cooling from ~2.4 ka BP at the Vøring Plateau and presumably earlier in the west but is difficult to date there because of the low sedimentation rates. This is a general issue in many areas of the Nordic Seas and appears to have an important effect on cyst concentrations and assemblage composition, with the possible loss of oxygenation-sensitive cysts in the older parts of the cores. Comparing dinocyst-based quantitative reconstructions with those retrieved from other plankton reveals a significantly different trend between proxies, linked to a differing autecological response to seasonal changes at their respective depth habitats. |
format |
Article in Journal/Newspaper |
author |
Van Nieuwenhove, Nicolas Baumann, Astrid Matthiessen, Jens Bonnet, Sophie de Vernal, Anne |
author_facet |
Van Nieuwenhove, Nicolas Baumann, Astrid Matthiessen, Jens Bonnet, Sophie de Vernal, Anne |
author_sort |
Van Nieuwenhove, Nicolas |
title |
Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages |
title_short |
Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages |
title_full |
Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages |
title_fullStr |
Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages |
title_full_unstemmed |
Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages |
title_sort |
sea surface conditions in the southern nordic seas during the holocene based on dinoflagellate cyst assemblages |
publishDate |
2016 |
url |
https://pure.au.dk/portal/en/publications/dd908908-4579-4965-90dd-b73a229d382a https://doi.org/10.1177/0959683615618258 |
long_lat |
ENVELOPE(4.000,4.000,67.000,67.000) |
geographic |
Vøring Plateau |
geographic_facet |
Vøring Plateau |
genre |
Iceland Nordic Seas |
genre_facet |
Iceland Nordic Seas |
op_source |
Van Nieuwenhove , N , Baumann , A , Matthiessen , J , Bonnet , S & de Vernal , A 2016 , ' Sea surface conditions in the southern Nordic Seas during the Holocene based on dinoflagellate cyst assemblages ' , The Holocene , vol. 26 , no. 5 , pp. 722-735 . https://doi.org/10.1177/0959683615618258 |
op_relation |
https://pure.au.dk/portal/en/publications/dd908908-4579-4965-90dd-b73a229d382a |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1177/0959683615618258 |
container_title |
The Holocene |
container_volume |
26 |
container_issue |
5 |
container_start_page |
722 |
op_container_end_page |
735 |
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1798848357642272768 |